Originally posted by sigma:
what is a PCM, and how do I disconnect it?



The PCM is the computer that runs your vehicle,
and causes your CEL to light.
It is called the Powertrain Control Module (PCM).

It can be reset one of two ways...

Disconnecting the negative battery terminal,

or

Removing underhood fuse(s) #4, #11, and sometimes #9, which is a big fuse.
With the fuses removed, if you were to turn your ignition to the ON position,
your Check Engine Light, should NOT light up.

Pete... 2004 Mercury Marauder 300A Black Clearcoat/Dark Charcoal LEATHER DOB 10/31/2003 DOP 1/2/2004 www.mercurymarauder.net